Rukia was taken away 의해 Byakuya and Renji in episode 17 if I'm not wrong, so episode 18 would be "Reclaim! The Power of the Shinigami" . If 당신 want to know where to watch it maybe 당신 can try searching in Dailymotion for it, I watch Bleach there plenty of times...
As for the filler episodes hahah there are wayyy too many to list right now because the 아니메 has just released it's 288th episode lol. There is the Bounto Arc, the whole arc with the Bakkōtō, plus this story with a princess and her 2 shinigami guardians.....I can go on forever lol
Try this website, it has all the episodes listed, even the filler ones...
link Hope this helps haha :D